EP1110979A1 - Polyvinylalkohol-stabilisierte 1,3-Dien-(Meth)acrylsäureester-Mischpolymerisate - Google Patents
Polyvinylalkohol-stabilisierte 1,3-Dien-(Meth)acrylsäureester-Mischpolymerisate Download PDFInfo
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- EP1110979A1 EP1110979A1 EP00125252A EP00125252A EP1110979A1 EP 1110979 A1 EP1110979 A1 EP 1110979A1 EP 00125252 A EP00125252 A EP 00125252A EP 00125252 A EP00125252 A EP 00125252A EP 1110979 A1 EP1110979 A1 EP 1110979A1
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- polymerization
- polyvinyl alcohol
- weight
- polyvinyl
- protective colloid
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B26/06—Acrylates
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F236/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds
- C08F236/02—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds
- C08F236/04—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/10—Compositions or ingredients thereof characterised by the absence or the very low content of a specific material
- C04B2111/1006—Absence of well-defined organic compounds
Definitions
- the invention relates to polyvinyl alcohol stabilized Copolymers of 1,3-dienes with methacrylic acid esters and / or acrylic acid esters in the form of their aqueous polymer dispersions or polymer powder redispersible in water, and a process for their manufacture and their use.
- polymer dispersions have which are stabilized with polyvinyl alcohol (PVAl), characteristic rheological and tack properties, so that this in contrast to emulsifier-stabilized dispersions for Coating and adhesive applications are particularly suitable.
- PVAl polyvinyl alcohol
- To the Example include paper packaging adhesives made with emulsifier-stabilized copolymer dispersions versus PVAl-stabilized Copolymer dispersions due to the fine Particles (particle size generally ⁇ 400 nm), the rheology and the low surface tension of the emulsifier stabilized Dispersion, poor machine running properties.
- a disadvantage of using copolymer dispersions on vinyl ester or acrylic acid ester based adhesives is that due to their generally relatively high glass transition temperature (Tg) or the minimum film formation temperature (MFT) Adding plasticizer for processing is necessary.
- the polymer resin can be manufactured in a wide Tg range (-80 ° C ⁇ Tg ⁇ + 100 ° C).
- the aqueous dispersion or redispersion should the advantageous rheological properties (machine running properties) of stabilized with polyvinyl alcohol Have vinyl ester or acrylate dispersions and even at low Tg, plasticizer-free, good adhesion to the various substrates such as paper, plastics, minerals exhibit.
- DE-A 2442121 (GB-A 1438449) it was known that polyvinyl alcohol as the sole dispersant in the manufacture of polymers of (meth) acrylic acid esters or butadienes is not effective, and therefore always in a mixture has been used with emulsifiers.
- DE-A 2442121 is therefore used for the production of stabilized with polyvinyl alcohol Polymers of (meth) acrylate or butadiene monomers the use of an alkali metal olefin sulfonate modified polyvinyl alcohol recommended.
- the disadvantage is that it is also an ionic stabilizer, and therefore those described above for emulsifiers Disadvantages also occur.
- US-A 5200459 recommends for the production of polyvinyl alcohol stabilized, aqueous butadiene copolymer latices the copolymerization in the presence of a stabilizing Solvent, especially from the group of alcohols.
- WO-A 99/28360 describes the production of polyvinyl alcohol stabilized styrene-butadiene copolymer dispersions or dispersion powder known.
- Styrene-containing copolymer dispersions however, have the disadvantage of being used for many applications (e.g. in adhesives) unfavorable viscoelastic Polymer properties (poor deformability).
- Styrene produces in the copolymer polymer domains with high Tg; this lead to less favorable viscoelastic resin properties. The consequence of these, for example in the case of adhesives, are poorer wetting properties and a worse tack.
- the invention relates to emulsifier and solvent-free and with non-ionic polyvinyl alcohol as a protective colloid Stabilized copolymers of 1,3-dienes with methacrylic acid esters and / or acrylic acid esters in the form of their aqueous Polymer dispersions or polymer powder redispersible in water obtainable by emulsion polymerization, and optionally Drying the polymer dispersions thus obtained, wherein 10 to 100 wt .-% of the polyvinyl alcohol content before Initiation of the polymerization are submitted and the rest Portion is metered in during the polymerization, and controlled the addition of polyvinyl alcohol and the comonomers is that during the polymerization the amount of protective colloid always 1 to 70 wt .-% of the total amount of free comonomers is.
- Another object of the invention is a method for Production of emulsifier and solvent-free, with polyvinyl alcohol as a protective colloid stabilized copolymers of 1,3-dienes with methacrylic acid esters and / or acrylic acid esters in the form of their aqueous polymer dispersions or polymer powder redispersible in water by emulsion polymerization a mixture containing one or more comonomers from the group of 1,3-dienes and one or more comonomers from the group of methacrylic acid esters and acrylic acid esters in the presence of 1 to 15 wt .-%, based on the total weight of the monomers, one or more polyvinyl alcohols and optionally drying the polymer dispersions thus obtained, wherein 10 to 100 wt .-% of the polyvinyl alcohol content be submitted before the initiation of the polymerization and the remaining portion metered in during the polymerization and the addition of polyvinyl alcohol and the comonomers is controlled so that the amount
- Suitable 1,3-dienes, 1,3-butadiene and isoprene are preferred becomes 1,3-butadiene.
- Suitable methacrylic acid esters and acrylic acid esters are those of unbranched and branched alcohols with 1 to 10 carbon atoms.
- Preferred methacrylic acid esters are Methyl methacrylate, ethyl methacrylate, propyl methacrylate, n-butyl methacrylate. Methyl methacrylate is particularly preferred.
- Preferred acrylic acid esters are methyl acrylate, ethyl acrylate, Propyl acrylate, n-butyl acrylate, t-butyl acrylate, t-butyl methacrylate, 2-ethylhexyl acrylate.
- Methyl acrylate is particularly preferred, n-butyl acrylate and 2-ethylhexyl acrylate.
- auxiliary monomers are ethylenically unsaturated Mono- and dicarboxylic acids, preferably acrylic acid, Methacrylic acid, fumaric acid and maleic acid; ethylenically unsaturated Carboxamides and nitriles, preferably acrylamide and acrylonitrile; Mono- and diesters of fumaric acid and maleic acid such as the diethyl and diisopropyl esters and maleic anhydride, ethylenically unsaturated sulfonic acids or their Salts, preferably vinylsulfonic acid, 2-acrylamido-2-methylpropanesulfonic acid.
- Mono- and diesters of fumaric acid and maleic acid such as the diethyl and diisopropyl esters and maleic anhydride, ethylenically unsaturated sulfonic acids or their Salts, preferably vinylsulfonic acid, 2-acrylamido-2-methylpropanesulfonic acid.
- Pre-crosslinking comonomers are further examples such as polyethylenically unsaturated comonomers, for example Divinyl adipate, diallyl maleate, allyl methacrylate or triallyl cyanurate, or post-crosslinking comonomers, for example Acrylamidoglycolic acid (AGA), methyl acrylamidoglycolic acid methyl ester (MAGME), N-methylol acrylamide (NMA), N-methylol methacrylamide, N-methylolallyl carbamate, alkyl ethers such as the isobutoxy ether or ester of N-methylol acrylamide, N-methylol methacrylamide and the N-methylolallyl carbamate.
- AGA Acrylamidoglycolic acid
- MAGME methyl acrylamidoglycolic acid methyl ester
- NMA N-methylol acrylamide
- alkyl ethers such as the isobutoxy ether or ester
- Suitable are also epoxy-functional comonomers such as glycidyl methacrylate and glycidyl acrylate.
- Other examples are silicon functional ones Comonomers such as Acryloxypropyltri (alkoxy) - and Methacryloxypropyltri (alkoxy) silanes, vinyltrialkoxysilanes and Vinylmethyldialkoxysilane, for example as alkoxy groups Contain ethoxy and ethoxypropylene glycol ether residues could be.
- Monomers with hydroxyl or CO groups may also be mentioned, for example, methacrylic acid and acrylic acid hydroxyalkyl esters such as hydroxyethyl, hydroxypropyl or hydroxybutyl acrylate or methacrylate and compounds such as diacetone acrylamide and acetylacetoxyethyl acrylate or methacrylate.
- the selection of monomers and the selection of the proportions by weight of the comonomers is carried out such that in general a glass transition temperature Tg of from -80 ° C. to + 100 ° C., preferably from -50 ° C. to + 50 ° C., particularly preferably from -20 ° C. to + 40 ° C results.
- the glass transition temperature Tg of the polymers can be determined in a known manner by means of differential scanning calorimetry (DSC).
- DSC differential scanning calorimetry
- Tg n the glass transition temperature in degrees Kelvin of the homopolymer of monomer n. Tg values for homopolymers are listed in Polymer Handbook 2nd Edition, J. Wiley & Sons, New York (1975).
- Mixtures with 20 to 80% by weight are particularly preferred 30 to 55% by weight of (meth) acrylic acid ester, in particular Methyl methacrylate, and 20 to 80% by weight, preferably 45 to 70 wt .-% 1,3-diene, especially 1,3-butadiene, the mixtures optionally one or more of the above May contain auxiliary monomers in the amounts indicated, and the proportions in% by weight add up to 100% by weight.
- the production of the polyvinyl alcohol-stabilized copolymers is carried out according to the emulsion polymerization process with the exclusion of emulsifier, the polymerization temperature generally 40 ° C to 100 ° C, preferably 60 ° C to Is 90 ° C.
- the polymerization with 1,3-butadiene takes place under the vapor pressure of the reaction mixture, generally between 2 and 15 bar, at the chosen polymerization temperature.
- gaseous comonomers such as Ethylene or vinyl chloride can also be used under higher pressure generally between 5 bar and 100 bar.
- the polymerization is initiated with those for the emulsion polymerization common, at least partially water-soluble, thermal initiators or redox initiator combinations.
- Suitable organic initiators are hydroperoxides such as tert-butyl hydroperoxide, tert-butyl peroxopivalate, Cumene hydroperoxide, isopropylbenzene monohydroperoxide or azo compounds such as azobisisobutyronitrile.
- Suitable inorganic Initiators are the sodium, potassium and ammonium salts Peroxodisulfuric acid. The initiators mentioned are in generally in an amount of 0.05 to 3 wt .-%, based on the total weight of the monomers used.
- Suitable reducing agents are the sulfites and bisulfites of the alkali metals and of ammonium, for example sodium sulfite, the derivatives of sulfoxyl acid such as zinc or alkali formaldehyde sulfoxylates, for example sodium hydroxymethanesulfinate, and ascorbic acid.
- the amount of reducing agent is preferably 0.01 to 5.0 wt .-%, based on the total weight of the Monomers.
- Suitable polyvinyl alcohols are nonionic, partially saponified Polyvinyl acetates and nonionic, hydrophobically modified, partially saponified polyvinyl esters and mixtures thereof, the mentioned polyvinyl alcohols also in a mixture with others Protective colloids can be used.
- Nonionic, partially saponified polyvinyl acetates are particularly preferred with a degree of hydrolysis of 80 to 95 mol%, and a Höppler viscosity (4% aqueous solution, DIN 53015, Höppler method at 20 ° C) from 1 to 30 mPas, preferably 2 to 15 mPas.
- nonionic, hydrophobically modified, partially saponified polyvinyl esters which as a 2% aqueous solution produce a surface tension of 40 40 mN / m.
- Suitable hydrophobically modified, partially saponified polyvinyl esters can be obtained, for example, by hydrophobicizing polyvinyl acetate by copolymerizing vinyl acetate with hydrophobic comonomers.
- Examples of this are isopropenyl acetate, long-chain, preferably with 7 to 15 carbon atoms, branched and unbranched vinyl esters such as vinyl pivalate, vinyl ethyl hexanoate, vinyl esters of saturated alpha-branched monocarboxylic acids with 5 or 9 to 11 carbon atoms, dialkyl maleate and dialkyl fumarates from C 1 to C 12 - alcohols such as diisopropyl maleate and diisopropyl fumarate, vinyl chloride, vinyl alkyl ethers of alcohols with at least 4 C atoms such as vinyl butyl ether, C 2 - to C 10 olefins such as ethene and decene.
- the water repellency can also be carried out by polymerizing vinyl acetate in the presence of regulators such as alkyl mercaptans with a C 2 -C 18 -alkyl radical such as dodecyl mercaptan or tert-dodecyl mercaptan.
- regulators such as alkyl mercaptans with a C 2 -C 18 -alkyl radical such as dodecyl mercaptan or tert-dodecyl mercaptan.
- Another possibility for the hydrophobization of polyvinyl acetate is the polymer-analogous reaction, for example acetalization of vinyl alcohol units in partially saponified polyvinyl acetate with C 1 to C 4 aldehydes such as butyraldehyde.
- the proportion of the hydrophobic units is preferably 0.1 up to 10 wt .-%, based on the total weight of the partially saponified Polyvinyl acetate.
- the degree of hydrolysis is from 70 to 99.9 mole%, preferably 84 to 92 mole%, the Höppler viscosity (DIN 53015, Höppler method, 4% aqueous solution) from 1 to 30 mPas, preferably 2 to 15 mPas.
- the above Protective colloids are by means of methods known to those skilled in the art accessible.
- hydrophobically modified, partially hydrolyzed polyvinyl esters are the partially hydrolyzed polyvinyl acetates with 84 to 92 mol% of vinyl alcohol units and 0.1 to 10% by weight of units which are different from vinyl esters of an alpha-branched carboxylic acid with 5 or 9 to 11 carbon atoms.
- vinyl esters examples are those which are available as vinyl versatic acid esters from Shell under the names VeoVa R 5, VeoVa R 9, VeoVa R 10 and VeoVa R 11.
- Combinations of the hydrophobically modified polyvinyl esters with partially hydrolyzed polyvinyl acetates with a degree of hydrolysis of 80 to 95 mol%, a Höppler viscosity of 1 to 30 mPas, preferably 2 to 15 mPas, which are in the form of 2% aqueous, are also particularly preferred Solution generate a surface tension of> 40 mN / m.
- Suitable other protective colloids which are mixed with the mentioned polyvinyl alcohols can be used Polyvinyl pyrrolidones, carboxymethyl, methyl, hydroxyethyl, Hydroxypropyl cellulose, starches, dextrins, cyclodextrins, poly (meth) acrylic acid, Poly (meth) acrylamide, polyvinyl sulfonic acids, Melamine formaldehyde sulfonates, naphthalene formaldehyde sulfonates, Styrene maleic acid and vinyl ether maleic acid copolymers.
- the protective colloids are generally used in an amount of a total of 1 to 15 wt .-%, based on the total weight of the Monomers added during the polymerization.
- a protective colloid combination is the weight ratio from hydrophobic, partially saponified polyvinyl ester to non-hydrophobic, partially saponified polyvinyl alcohol 10/1 up to 1/10.
- To control the molecular weight are preferably at substances regulating the polymerization (regulator) are used.
- substances regulating the polymerization include n-dodecyl mercaptan, tert-dodecyl mercaptan, Mercaptopropionic acid, mercaptopropionic acid methyl ester, Isopropanol and acetaldehyde. They are usually in amounts between 0.01 to 5.0% by weight, preferably 0.5 up to 2.0% by weight, based in each case on those to be polymerized Monomers used.
- the initiator as a whole is used to initiate the polymerization presented, partially presented and partially dosed, or added in total.
- the polyvinyl alcohol content or Share of additional protective colloid and the share of comonomers can be submitted in total, partially submitted and partially dosed, or dosed as a whole.
- a preferred embodiment is the whole Protective colloid content and 5 to 25 wt .-% of the total amount to be submitted to comonomer, and the remaining amount of comonomer during to meter the polymerization.
- a procedure for under is also preferred submission of the entire protective colloid or sub-submission of the Protective colloids the comonomer portion and the controller portion partially are presented and the rest is metered in each case. It can be done so that comonomers and regulators in the template and the dosage in a constant ratio be added.
- the ratio of controller is preferred to comonomer in the template larger than in the dosage, in addition are preferably 15 to 50 wt .-% of the total amount of the regulator submitted and 5 to 25 wt .-% of the total amount of comonomers submitted.
- a Component from the protective colloid combination preferably the hydrophobized, partially saponified polyvinyl esters are submitted, and the other is dosed, or part of the mixture submitted and the rest metered as an aqueous solution become.
- residual monomer can be removed are polymerized using known methods, for example, by post-polymerization initiated with a redox catalyst. Volatile residual monomers can also be distilled, preferably under reduced pressure, and optionally by passing or passing inert Drag gases such as air, nitrogen or water vapor are removed become.
- the aqueous obtained with the inventive method Dispersions have a solids content of 30 to 75% by weight, preferably from 40 to 65% by weight.
- the aqueous dispersions become redispersible polymer powders dried, for example by means of fluidized bed drying, Freeze drying or spray drying.
- the dispersions are spray dried. Spray drying takes place in conventional spray drying systems, the Atomization using one, two or multi-component nozzles or with a rotating disc can take place.
- the outlet temperature is generally preferred in the range of 55 ° C to 100 ° C 70 ° C to 90 ° C, depending on the system, Tg of the resin and desired Dryness level selected.
- the total amount of protective colloid before drying should preferably be at least 10% by weight, based on the polymer content be. To ensure redispersibility it is usually necessary to disperse it before drying Add more protective colloids as an atomization aid. In Usually the spray aid is used in an amount of 5 to 25 % By weight, based on the polymeric constituents of the dispersion, used.
- Suitable atomization aids are partially saponified polyvinyl acetates; Polyvinyl pyrrolidones; Polysaccharides in water-soluble Form like starches (amylose and amylopectin), celluloses and their Carboxymethyl, methyl, hydroxyethyl, hydroxypropyl derivatives; Proteins such as casein or caseinate, soy protein, gelatin; Lignin sulfonates; synthetic polymers such as poly (meth) acrylic acid, Copolymers of (meth) acrylates with carboxyl functional Comonomer units, poly (meth) acrylamide, Polyvinylsulfonic acids and their water-soluble copolymers; Melamine formaldehyde sulfonates, naphthalene formaldehyde sulfonates, Styrene maleic acid and vinyl ether maleic acid copolymers.
- the powder obtained can with an anti-blocking agent (anti-caking agent), preferably up to 30% by weight, based on the total weight of polymer components, be transferred.
- antiblocking agents are Ca or Mg carbonate, talc, gypsum, silica, silicates with particle sizes preferably in the range from 10 nm to 10 ⁇ m.
- constituents contained in preferred embodiments of dispersion powder compositions are, for example Pigments, fillers, foam stabilizers, water repellents.
- the polyvinyl alcohol-stabilized 1,3-diene (meth) acrylic acid copolymers can in the form of their aqueous polymer dispersions or polymer powder redispersible in water the typical areas of application.
- binders such as cements (Portland, Aluminate, trass, metallurgical, magnesia, phosphate cement), gypsum, Water glass, for the production of building adhesives, plasters, fillers, Floor leveling compounds, sealing slurries, grout and colors.
- binders such as cements (Portland, Aluminate, trass, metallurgical, magnesia, phosphate cement), gypsum, Water glass, for the production of building adhesives, plasters, fillers, Floor leveling compounds, sealing slurries, grout and colors.
- An example of use as an adhesive is adhesive bonding of porous substrates, such as gluing wood for wood-wood bonding, the bonding of wood with absorbent Substrates such as screed, especially parquet bonding.
- Further applications are the waterproof bonding of Paper and cardboard, for example as packaging adhesive and Bookbinding adhesive.
- the copolymers are suitable as adhesives also for bonding fiber materials made of natural or synthetic fiber, for example for the production of wood fiber boards, for the consolidation of nonwovens from natural or Synthetic fibers, for the production of molded parts from fiber materials and for the production of precursors of such molded parts, the so-called semi-finished products (waddings).
- the wadding for example of upholstery, Insulating and filter wadding, the production of laminates such as Insulation materials.
- gypsum mortar for leveling compounds, joint fillers, CaSO 4 flow screeds, jointing compounds, adhesive mortars or the use for the production of gypsum boards or gypsum molds.
- Other applications are, for example, plasters or plastering, also outdoors.
- the usual applications for the correspondingly modified CaCO 3 materials are joint fillers (joint fillers), gypsum-free fillers and plasters.
- the copolymer is used in an amount of 0.2 to 15% by weight, based on the dry weight of the formulation.
- leveling compounds Use in self-leveling leveling compounds (leveling compounds) and screeds is also preferred.
- the formulations also contain 5 to 80% by weight of inorganic, hydraulically setting binders such as cement, gypsum or mixtures thereof.
- Another constituent of the recipe is 5 to 80% by weight of inorganic fillers such as sand, quartz powder, chalk, limestone powder, filter ash or mixtures thereof.
- flow-promoting additives such as casein or cement plasticizers can optionally be added to the dry mixture.
- the data in% by weight always refer to 100% by weight of dry matter of the formulation for floor leveling compounds.
- the ready-to-use leveling compound is finally obtained by adding water to the above-mentioned dry mixture.
- the ready-to-use, water-filled floor filler can be used to produce screeds and self-leveling coatings for leveling, leveling and smoothing substrates.
- Typical recipes contain 5 to 80 wt .-% cement, 5 to 80 wt .-% fillers such as quartz sand, calcium carbonate or talc, 0.1 to 2 % By weight of thickeners such as cellulose ethers, layered silicates, Polyacrylates, 0.5 to 60 wt .-% of the PVAl-stabilized (Meth) acrylate-1,3-diene copolymers in the form of the polymer dispersion or of the polymer powder and optionally other Additives to improve stability, processability, open time and water resistance.
- the data in% by weight always refer to 100% by weight dry matter of the recipe. Find the mentioned cementitious building adhesive formulations especially when laying tiles of all kinds (earthenware, Stoneware, fine stoneware, ceramics, natural tiles) and outdoor use as tile adhesive and will be before using it with the appropriate amount of water touched.
- (meth) acrylate-1,3-diene copolymers prepared according to the invention is their with increasing 1,3-diene content improved saponification resistance compared to pure acrylate copolymers. This keeps the mechanical copolymer properties such as tensile strength and elongation at break Application on alkaline substrates received unchanged. Furthermore, on alkaline substrates with such saponification-stable systems no or only small amounts toxicologically controversial alcohols such as Butanol or 2-ethylhexanol released.
- styrene-acrylate copolymers have the copolymers prepared according to the invention due to their advantageous viscoelastic properties Improved application technology, especially for adhesive applications Properties, especially high surface stickiness (Tack), high adhesion (peel strength) and high cohesion (Shear resistance). It should also be emphasized excellent cement stability especially with hydrophobic modified polyvinyl alcohols stabilized copolymers.
- the (meth) acrylate-1,3-diene copolymers prepared according to the invention also have the advantageous rheological Properties (machine running properties) of with polyvinyl alcohol stabilized vinyl ester or acrylate dispersions.
- the pH was adjusted to 4.0 to 4.2 with 10% by weight formic acid.
- the mixture was then evacuated, flushed with nitrogen, evacuated again and a mixture of 151 g of methyl methacrylate, 129 g of 1,3-butadiene and 8.5 g of tert-dodecyl mercaptan was sucked in. This mixture was stabilized against premature polymerization by adding 30 mg of benzoquinone.
- the polymerization was started by simultaneously running in two catalyst solutions, the first of 110 g of deionized water and 15.5 g of a 40% aqueous tert-butyl hydroperoxide solution and the other of 116 g of deionized water and 13 g Sodium formaldehyde sulfoxylate consisted of the two catalyst solutions being metered in at the same feed rate (18 ml / h).
- the metered addition of a mixture of 729 g of 1,3-butadiene, 856 g of methyl methacrylate and 9.5 g of tert-dodecyl mercaptan was started at a rate of 5.3 g / min.
- the polymerization was continued for a further 2 h at 80 ° C. with the feed rate of the initiator solution unchanged, and the feed of the initiator solutions was then stopped and cooled.
- the dispersion was prepared analogously to Example 1, but with the introduction of 900 g of a 20% by weight aqueous solution of a partially hydrolyzed polyvinyl acetate with a degree of hydrolysis of 88 mol%, a Höppler viscosity of the 4% solution of 4 mPas % By weight dissolved in water produced a surface tension of 44 mN / m as the sole protective colloid. All other measures corresponded to example 1. 50% by weight of a 10.3% by weight solution of a polyvinyl alcohol (partially saponified polyvinyl acetate, degree of hydrolysis 88 mol%) were added to the dispersion and sprayed through a two-component nozzle.
- Air prepressed to 4 bar was used as the atomizing component, and the drops formed were dried in cocurrent with air heated to 125.degree.
- the dry powder obtained was mixed with 10% commercially available antiblocking agent (mixture of calcium-magnesium carbonate and magnesium hydrosilicate). A 50% redispersion of the powder was used for testing.
- the dispersion was prepared analogously to Example 1, but with the introduction of 900 g of a 20% by weight aqueous solution of a partially saponified copolymer of vinyl acetate and VeoVa R 10 with a degree of hydrolysis of 88 mol% and a Höppler viscosity of the 4% solution of 4 mPas, which, when dissolved in water by 2% by weight, generated a surface tension of 37 mN / m, as the sole protective colloid. All other measures corresponded to example 1.
- the dispersion was dried as in Example 2. A 50% redispersion of the powder was used for testing.
- the dispersion was prepared analogously to Example 1, with instead of the partially saponified polyvinyl acetate 800 g 10% by weight aqueous solution of a yellow dextrin (Avedex 35, Avebe), which has a surface tension of 2% by weight dissolved in water of 50 mN / m, together with the hydrophobically modified Polyvinyl alcohol was used. All other Measures corresponded to example 1.
- the dispersion was prepared analogously to Example 1, but with presentation of 137 g of methyl methacrylate, 143 g of 1,3-butadiene and 9.4 g of tert-dodecyl mercaptan. A was added Mixture consisting of 777 g methyl methacrylate, 808 g 1,3-butadiene and 10.5 g of tert-dodecyl mercaptan. All other measures corresponded to example 1.
- the dispersion was prepared analogously to Example 1, but with presentation of 120 g of methyl methacrylate, 159 g of 1,3-butadiene and 10.4 g of tert-dodecyl mercaptan.
- the dispersion was prepared analogously to Example 1, but with presentation of 103 g of methyl methacrylate, 176 g of butadiene and 11.5 g of tert-dodecyl mercaptan. A mixture was metered in consisting of 587 g methyl methacrylate, 999 g 1,3-butadiene and 12.9 g of tert-dodecyl mercaptan. All other measures corresponded Example 1.
- the dispersion was prepared analogously to Example 1, but with presentation of 84 g of methyl methacrylate, 196 g of butadiene and 12.8 g of tert-dodecyl mercaptan. A mixture was metered in consisting of 475 g methyl methacrylate, 1110 g 1,3-butadiene and 14.3 g of tert-dodecyl mercaptan. All other measures corresponded Example 1.
- the dispersion was prepared analogously to Example 1, but with presentation of 78 g styrene and 201 g n-butyl acrylate. A mixture consisting of 444 g of styrene and 1142 g of n-butyl acrylate. On the addition of tert-dodecyl mercaptan was waived. All other measures corresponded Example 1.
- the dispersion was prepared analogously to Example 1, with both in the template and in the dosage instead Methyl methacrylate styrene used. All other measures corresponded to example 1.
- the dispersion was prepared analogously to Example 1, but with presentation of 78 g of methyl methacrylate and 201 g of n-butyl acrylate. A mixture consisting of 444 g was metered in Methyl methacrylate and 1142 g n-butyl acrylate. On the expand no tert-dodecyl mercaptan was used. All other measures corresponded to example 1.
- the dispersion was prepared analogously to Example 1, but with 137 g of styrene, 143 g of 1,3-butadiene and 9.4 g of tert-dodecyl mercaptan. A mixture of was metered in 777 g styrene, 808 g 1,3-butadiene and 10.5 g tert-dodecyl mercaptan. All other measures corresponded to example 1.
- the dispersion was prepared analogously to Example 1, but with presentation of 120 g of styrene, 159 g of 1,3-butadiene and 10.4 g of tert-dodecyl mercaptan. A mixture of was metered in 682 g styrene, 904 g 1,3-butadiene and 11.6 g tert-dodecyl mercaptan. All other measures corresponded to example 1.
- the dispersion was prepared analogously to Example 1, but with presentation of 103 g styrene, 176 g 1,3-butadiene and 11.5 g of tert-dodecyl mercaptan. A mixture of was metered in 587 g styrene, 999 g 1,3-butadiene and 12.9 g tert-dodecyl mercaptan. All other measures corresponded to example 1.
- the dispersion was prepared analogously to Example 1, but with presentation of 84 g of styrene, 196 g of 1,3-butadiene and 12.8 g of tert-dodecyl mercaptan. A mixture was metered in from 475 g styrene, 1110 g 1,3-butadiene and 14.3 g tert-dodecyl mercaptan. All other measures corresponded Example 1.
- the dispersions or redispersions to be tested were applied to the carrier film with a doctor blade in such a thickness that a uniform polymer layer of 24 to 26 g / m 3 remained after drying.
- a 20 cm long and 2.5 cm wide polymer strip (carrier material: polymer plasticizer-containing PVC, 0.1 mm thick) was in Form of a loop hanging vertically with the polymer layer clamped outwards in the upper jaws of a tensile testing machine. Then the "loop" was pulled together the two jaws of the tensile testing machine vertically at one speed from 100 mm / minute to a horizontally fixed, carefully cleaned glass plate without applying pressure in one Length of about 3 cm. Then immediately followed same speed of pulling the polymer strip from the surface. The highest required to pull the loop off Force was used as a measure of surface stickiness taken here. The given value in N / 2.5cm is the average from five individual measurements, each time a fresh polymer strip and a fresh glass surface was used.
- Adhesion peel strength SF
- a 20 cm long and 2.5 cm wide polymer strip was made by one end starting in a length of approx. 12 cm on one carefully cleaned crystal glass surface applied without bubbles. By rolling 5 times (back and forth) with a 2.2 kg heavy steel roller covered with silicone rubber was the Polymer strips pressed on. After 8 minutes or 24 hours Storage in a climate room at 23 ° C and 50% relative humidity the polymer strip was at a speed deducted from 300 mm / minute at a 180 ° angle over a length of 5 cm. The average force required for this was measured. The values given in N / 2.5cm are average values 5 individual measurements each.
- a 5 cm long and 2.5 cm wide polymer strip was made with an area of 2.5 cm x 2.5 cm so on a carefully cleaned Glass plate placed bubble-free that the rest of the piece Polymer strips protruded from the edge of the glass plate.
- the Strip was made by rolling it on (5 times back and forth) with a 2.2 kg steel roller covered with silicone rubber pressed on. After a bonding time of 8 minutes a glass plate at an angle of 2 ° to the vertical (um Securely exclude peeling forces) fixed in a holder, that the free end of the polymer strip was hanging down. At this end, a weight of 2 kg was suspended freely. The time was determined until the free end of the Polymer strip under the pull of the weight from the glass plate solved. The measurement was carried out in a climate room at 23 ° C and 50 % relative humidity. The specified Values in minutes are mean values from 3 individual measurements each.
- the Erlenmeyer flask was closed with a stopper and at Leave 70 ° C in a climatic cabinet for 24 h. Then was the dispersion film is removed from the KOH solution with deionized Rinsed water and patted dry with a paper fleece.
- the alkaline treated and an untreated film piece 24 h in a standard climate (23 ° C, 50% humidity) dried before making specimens of size 50 mm x 8 mm were punched out according to DIN 53504 / NSt S3a. Test specimen of the alkaline treated and untreated dispersion film then under standard conditions according to DIN 53504 for tensile strength and elongation at break are checked.
- Example 1 Comparison of Example 1 with Comparative Examples 1 and Figure 2 shows that the 1,3-butadiene-methyl methacrylate copolymers compared to the corresponding styrene-butyl acrylate (Comparative Example 1) and styrene-1,3-butadiene copolymers show significantly better adhesion and cohesion.
- Example 1 Comparison of Example 1 with Comparative Example 3 shows that the 1,3-butadiene-methyl methacrylate copolymers are essential are more stable to saponification than the corresponding butyl acrylate / methyl methacrylate copolymer. With the latter the alkali treatment leads to a significant deterioration of elongation at break and tensile strength.
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Abstract
Description
Monomere.
Die gebrauchsfertige, mit Wasser angemachte Bodenspachtelmasse kann zur Herstellung von Estrichen und selbstnivellierenden Beschichtungen zum Ebnen, Ausgleichen und Glätten von Untergründen eingesetzt werden.
Man erhielt eine stabile, grobteilige (Coulter LS 230; Dw = 950 nm) und koagulatfreie Dispersion, die bei einem Festkörpergehalt von 51 % eine Viskosität (Brookfield-Viskosimeter, 20°C, 20 Upm) von 380 mPas aufwies.
Zur Testung wurde eine 50 %-ige Redispersion des Pulvers eingesetzt.
Die Dispersion wurde analog Beispiel 2 getrocknet. Zur Testung wurde eine 50 %-ige Redispersion des Pulvers eingesetzt.
Beispiel | Polymer | Tg | Unbehandelt | Alkalibehandelt | Tack | SSF | SF | ||
[°C] | RD [%] | Rf [N/mm2] | RD [%] | Rf [N/mm2] | [N/2,5 cm] | [min] | [N/2,5 cm] | ||
1 | Bu/MMA | -10 | 345 | 12,3 | 305 | 10,1 | 2.1 | 2100 | 10.3 |
2 | Bu/MMA | -10 | 332 | 13,1 | 301 | 11,2 | 2.0 | 2300 | 11.1 |
3 | Bu/MMA | -10 | 360 | 12,7 | 306 | 10,8 | 2.2 | 2250 | 10.8 |
4 | Bu/MMA | -10 | 310 | 13,3 | 295 | 11,5 | 2.1 | 2400 | 10.9 |
5 | Bu/MMA | -20 | 395 | 14,7 | 370 | 14,9 | 5.1 | >3000 | 12.9 |
6 | Bu/MMA | -30 | 450 | 16,1 | 455 | 15,9 | 8.7 | >3000 | 14.9 |
7 | Bu/MMA | -40 | 485 | 18,3 | 478 | 18,2 | 11.5 | >3000 | 16.0 |
8 | Bu/MMA | -50 | 520 | 19,1 | 526 | 19,0 | 14.1 | >3000 | 19.4 |
Vergl. 1 | St/A | -10 | 298 | 10,5 | 290 | 8,7 | 1.3 | 320 | 7.3 |
Vergl. 2 | St/Bu | -10 | 335 | 13,2 | 330 | 12,5 | 1.8 | 420 | 6.9 |
Vergl. 3 | MMA/A | -10 | 256 | 14,3 | 155 | 6,2 | 2.3 | 1900 | 10.2 |
Vergl. 4 | St/Bu | -20 | 365 | 16,3 | 355 | 16,1 | 2.1 | 1600 | 8.3 |
Vergl. 5 | St/Bu | -30 | 420 | 18,5 | 415 | 18,1 | 4.1 | 2150 | 9.8 |
Vergl. 6 | St/Bu | -40 | 480 | 19,2 | 482 | 19,0 | 4.7 | 2850 | 10.4 |
Vergl. 7 | St/Bu | -50 | 523 | 19,3 | 510 | 19,1 | 5.8 | >3000 | 11.7 |
Bu = 1.3-Butadien, MMA = Methylmethacrylat, St = Styrol, | |||||||||
A = n-Butylacrylat |
Claims (28)
- Emulgator- und Lösungsmittel-freie und mit nichtionischem Polyvinylakohol als Schutzkolloid stabilisierte Mischpolymerisate von 1,3-Dienen mit Methacrylsäureestern und/oder Acrylsäureestern in Form deren wässrigen Polymerdispersionen oder in Wasser redispergierbaren Polymerpulver erhältlich durch Emulsionspolymerisation, und gegebenenfalls Trocknung der damit erhaltenen Polymerdispersionen, wobei 10 bis 100 Gew.-% des Polyvinylalkoholanteils vor der Initiierung der Polymerisation vorgelegt werden und der restliche Anteil während der Polymerisation zudosiert wird, und die Zugabe von Polyvinylalkohol und der Comonomere so gesteuert wird, daß während der Polymerisation die Menge an Schutzkolloid immer 1 bis 70 Gew.-% der Gesamtmenge an freien Comonomeren beträgt.
- Verfahren zur Herstellung von Emulgator- und Lösungsmittel-freien, mit Polyvinylalkohol als Schutzkolloid stabilisierten Mischpolymerisaten von 1,3-Dienen mit Methacrylsäureestern und/oder Acrylsäureestern in Form deren wässrigen Polymerdispersionen oder in Wasser redispergierbaren Polymerpulver durch Emulsionspolymerisation eines Gemisches enthaltend ein oder mehrere Comonomere aus der Gruppe der 1,3-Diene und ein oder mehrere Comonomere aus der Gruppe der Methacrylsäureester und Acrylsäureester in Gegenwart von 1 bis 15 Gew.-%, bezogen auf das Gesamtgewicht der Monomere, eines oder mehrerer Polyvinylalkohole und gegebenenfalls Trocknung der damit erhaltenen Polymerdispersionen, wobei 10 bis 100 Gew.-% des Polyvinylalkohol-anteils vor der Initiierung der Polymerisation vorgelegt werden und der restliche Anteil während der Polymerisation zudosiert wird, und die Zugabe von Polyvinylalkohol und der Comonomere so gesteuert wird, daß während der Polymerisation die Menge an Schutzkolloid immer 1 bis 70 Gew.-% der Gesamtmenge an freien Comonomeren beträgt.
- Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß Gemische mit 20 bis 80 Gew.-% (Meth)acrylsäureester und 80 bis 20 Gew.-% 1,3-Dien, polymerisiert werden, wobei die Gemische gegebenenfalls noch ein oder mehrere der obengenannten Hilfsmonomere in den angegebenen Mengen enthalten können, und sich die Anteile in Gew.-% auf 100 Gew.-% auf-addieren.
- Verfahren nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß als 1,3-Dien 1,3-Butadien oder Isopren copolymerisiert werden.
- Verfahren nach Anspruch 2 bis 4, dadurch gekennzeichnet, daß als Methacrylsäureester und Acrylsäureester ein oder mehrere aus der Gruppe Methylmethacrylat, Ethylmethacrylat, Propylmethacrylat, n-Butylmethacrylat, Methylacrylat, Ethylacrylat, Propylacrylat, n-Butylacrylat, t-Butylacrylat, t-Butylmethacrylat, 2-Ethylhexylacrylat copolymerisiert werden.
- Verfahren nach Anspruch 2 bis 5, dadurch gekennzeichnet, daß 1,3-Butadien und Methylmethacrylat copolymerisiert werden.
- Verfahren nach Anspruch 2 bis 6, dadurch gekennzeichnet, daß als Polyvinylalkohol ein oder mehrere aus der Gruppe der teilverseiften Polyvinylacetate und hydrophob modifizierten, teilverseiften Polyvinylester eingesetzt werden.
- Verfahren nach Anspruch 2 bis 7, dadurch gekennzeichnet, daß als Polyvinylalkohol teilverseifte Polyvinylacetate mit einem Hydrolysegrad von 80 bis 95 Mol-%, und einer Höpplerviskosität von 1 bis 30 mPas eingesetzt werden.
- Verfahren nach Anspruch 2 bis 8, dadurch gekennzeichnet, daß als Polyvinylalkohol hydrophob modifizierte, teilverseifte Polyvinylester, welche als 2 %-ige wässrige Lösung eine Oberflächenspannung von ≤ 40 mN/m erzeugen, eingesetzt werden.
- Verfahren nach Anspruch 9, dadurch gekennzeichnet, daß teilverseifte Polyvinylacetate mit 84 bis 92 Mol-% Vinylalkohol-Einheiten und 0.1 bis 10 Gew.-% an Einheiten, welche sich von Vinylestern einer alpha-verzweigten Carbonsäure mit 5 oder 9 bis 11 C-Atomen im Säurerest, Isopropenylacetat und Ethen ableiten, eingesetzt werden.
- Verfahren nach Anspruch 2 bis 10, dadurch gekennzeichnet, daß eine Kombination aus hydrophob modifiziertem Polyvinylester und teilverseiftem Polyvinylacetat als Polyvinylalkohol eingesetzt wird.
- Verfahren nach Anspruch 2 bis 11, dadurch gekennzeichnet, daß die Polymerisation in Gegenwart von Reglern durchgeführt wird.
- Verfahren nach Anspruch 12, dadurch gekennzeichnet, daß als Regler ein oder mehrere Substanzen aus der Gruppe n-Dodecylmercaptan, tert.-Dodecylmercaptan, Mercaptopropionsäure, Mercaptopropionsäuremethylester, Isopropanol und Acetaldehyd eingesetzt werden.
- Verfahren nach Anspruch 2 bis 13, dadurch gekennzeichnet, daß die damit erhaltenen wässrigen Dispersionen mittels Wirbelschichttrocknung, Gefriertrocknung oder Sprühtrocknung getrocknet werden.
- Verfahren nach Anspruch 2 bis 14, dadurch gekennzeichnet, daß der gesamte Schutzkolloidanteil sowie 5 bis 25 Gew.-% der Gesamtmenge an Comonomer vorgelegt wird und die restliche Comonomermenge während der Polymerisation zudosiert wird.
- Verfahren nach Anspruch 2 bis 14, dadurch gekennzeichnet, daß die Gesamtmenge an Schutzkolloid und die Gesamtmenge an Comonomer vor der Initiierung der Polymerisation vorgelegt wird und in Gegenwart von Regler polymerisiert wird.
- Verfahren nach Anspruch 2 bis 14, dadurch gekennzeichnet, daß unter Vorlage des gesamten Schutzkolloids oder unter Teilvorlage des Schutzkolloids der Comonomeranteil und der Regleranteil teilweise vorgelegt werden und der Rest jeweils zudosiert wird.
- Wässrige Polymerdispersionen und in Wasser redispergierbare Polymerpulver erhältlich nach einem der Verfahren gemäß Anspruch 2 bis 17.
- Verwendung der wässrigen Polymerdispersionen oder in Wasser redispergierbaren Polymerpulver gemäß Anspruch 1 und 18 in bauchemischen Produkten in Verbindung mit hydraulisch abbindenden Bindemitteln wie Zementen (Portland-, Aluminat-, Trass-, Hütten-, Magnesia-, Phosphatzement), Gips, Wasserglas, für die Herstellung von Bauklebern, Putzen, Spachtelmassen, Fußbodenspachtelmassen, Dichtschlämmen, Fugenmörtel und Farben.
- Verwendung der wässrigen Polymerdispersionen oder in Wasser redispergierbaren Polymerpulver gemäß Anspruch 1 und 18 als Alleinbindemittel für Beschichtungsmittel und Klebemittel.
- Verwendung der wässrigen Polymerdispersionen oder in Wasser redispergierbaren Polymerpulver gemäß Anspruch 1 und 18 als Beschichtungs- bzw. Bindemittel für Textilien und Papier.
- Verwendung gemäß Anspruch 19 als Gipsmörtel für Spachtelmassen, Joint-Filler, CaSO4-Fließestriche, Fugenmassen, Klebemörtel, zur Herstellung von Gipsplatten oder Gipsformen, in Putzen oder Stukkaturen.
- Verwendung gemäß Anspruch 19 zur Modifizierung von Fugenfüllern, gipsfreie Spachtelmassen und Putze auf Basis von CaCO3-Werkstoffen.
- Verwendung gemäß Anspruch 19 zur Anwendung in selbstverlaufenden Bodenspachtelmassen und Estrichen.
- Verwendung gemäß Anspruch 19 in zementhaltigen Baukleberrezepturen zur Verlegung von Fliesen im Innen- und Außenbereich.
- Verwendung gemäß Anspruch 20 als Klebemittel für die Verklebung von Holz zur Holz-Holz-Verklebung, die Verklebung von Holz mit saugfähigen Substraten wie Estrich und die Parkettverklebung.
- Verwendung gemäß Anspruch 20 als Verpackungsklebstoff und Buchbindeklebstoff.
- Verwendung gemäß Anspruch 20 als Bindemittel zur Verfestigung von Vliesstoffen von Natur- oder Kunstfasern, zur Herstellung von Formteilen aus Fasermaterialien, zur Herstellung von Vorstufen solcher Formteile, zur Wattenbindung und zur Herstellung von Laminaten.
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DE19962568A DE19962568C2 (de) | 1999-12-23 | 1999-12-23 | Verfahren zur Herstellung von Polyvinylalkohol-stabilisierten 1,3-Dien-(Meth)acrylsäureester-Mischpolymerisaten |
DE19962568 | 1999-12-23 |
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EP00125252A Withdrawn EP1110979A1 (de) | 1999-12-23 | 2000-11-24 | Polyvinylalkohol-stabilisierte 1,3-Dien-(Meth)acrylsäureester-Mischpolymerisate |
Country Status (3)
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US (1) | US6429251B2 (de) |
EP (1) | EP1110979A1 (de) |
DE (1) | DE19962568C2 (de) |
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WO2012159848A1 (de) * | 2011-05-24 | 2012-11-29 | Wacker Chemie Ag | Verfahren zur herstellung von schutzkolloid-stabilisierten polymerisaten |
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DE10333623A1 (de) * | 2003-07-24 | 2005-02-24 | Celanese Emulsions Gmbh | Beschichtungszusammensetzung und Verfahren zu deren Herstellung |
US20070277928A1 (en) * | 2006-06-01 | 2007-12-06 | Akzo Nobel Coatings International B.V. | Adhesive system |
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EP0062106A1 (de) * | 1981-03-24 | 1982-10-13 | Wacker-Chemie GmbH | Verfahren zur Herstellung von Copolymerisaten erhöhter Wasserfestigkeit und ihre Verwendung |
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US8217109B2 (en) | 2002-11-14 | 2012-07-10 | Wacker Chemie Ag | Protective-colloid-stabilized polymers in the form of their aqueous dispersions or of their water-redispersible powders |
WO2011110252A1 (de) * | 2010-03-12 | 2011-09-15 | Ardex Gmbh | Mörtel und verfahrer zur verlegung von fliesen, platten und natursteinen |
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Also Published As
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DE19962568C2 (de) | 2002-06-20 |
US6429251B2 (en) | 2002-08-06 |
DE19962568A1 (de) | 2001-07-12 |
US20010025078A1 (en) | 2001-09-27 |
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